Device for selectively changing the sense of rotation of the twist tubes of a false-twist machine

ABSTRACT

A mounting plate carrying rollers and drive means for driving a twist tube and a magnet for pressing the tube against the rims of the rollers, may be positioned in either of two positions 180* opposite from one another in order to reverse the sense of rotation of the tube by means on the mounting plate and on a machine frame which means cooperate with each other to permit such opposite mounting.

United States Patent 1191 Bieniok Aug. 6, 1974 DEVICE FOR SELECTIVELYCHANGING 2,883,824 4/1959 Andrews et al 57/7745 THE SENSE 0 ROTATION OTHE TWIST 3,488,676 1/1970 Bieniok 57/77.45 3,63l,665 l/l972 Scriven eta]. 57/77.45 TUBES OF A FALSE-TWIST MACHINE 3,686,846 8/l972 Smith 57/34HS [75] Inventor: Joachim Bieniok, Wattwil, 3,718,050 2/l973 Verhellen.57/77.45 X Switzerland 3,788,056 1/1974 Burri 57 7745 [73] Assignee:Heberlein & C0. AG, St. Gallen,

s it fl d Primary Examzner-John Petrakes Atto ne ,A nt, 0r Fir --Fitza'trick, Cella, Har er 122 Filed: Oct. 19, 1973 & 86 m p p [21] App].No.: 408,115

[57] ABSTRACT [30] Foreign Application Priority Data Nov 1 1972 Sweden 15901/72 A mounting plate carrying rollers and drive means for driving atwist tube and a magnet for pressing the tube [52] C1 57/77 45 57/104against the rims of the rollers, may be positioned in [51 Int Cl. u: 621/06 either of two positions 180 opposite from one another 58] Field 45in order to reverse the sense of rotation of the tube by means on themounting plate and. on a machine frame which means cooperate with eachother to permit [56] References Cited such opposite mounting.

UNITED STATES PATENTS 4 Claims, 4 Drawing Figures 2,837,889 6/1958 Comer57/104 PATENTED AUG sum DEVICE FOR SELECTIVELY CHANGING THE SENSE OFROTATION OF THE TWIST TUBES OF A FALSE-TWIST MACHINE The presentinvention relates to apparatus for texturing textile yarns, and moreparticularly to a device for selectively changing the sense of rotationof the twist tube of a false-twist texturing machine.

False-twisting machines for texturing synthetic yarns are known in whichthe twist tubes of a plurality of processing stations are directly orindirectly rotated by common drive means, such as a drive belt. Suchmachines may also be equipped with means for reversing the direction ofmovement of the drive means so as to change the sense of rotation of thetwist tubes.

A known machine of this type has for each processing station a bearingplate which can be swivelled about its center of gravity and carrying onit false-twist devices arranged in pairs, each of the false-twistdevices comprising a drive and a support roller and a permanent magnetkeeping the twist tubes in the cuneal throat between the rollers. Theactuation of a lever provided at the end of the support plate effectsapplication to or removal from the forward or rearward faces of thedrive belt so that opposite rotation of the twist tubes of the twofalse-twist devices is effected.

By means of this device, it is possible to have one half of the twisttubes of a machine rotating in one direction and the other half in theother direction. A selective change of the sense of rotation of thetwist tubes is, however, not possible.

The industry producing textured yarns presently requires false-twisttexturing machines in which the direction of rotation of the twist tubesof the various processing stations can be changed selectively andindependently from each other, but this requirement implies variousproblems. At first view, an essential requirement of the false-twistdevices used in the known texturing machines, consists in that the driveroller should rotate in the direction of rotation in which its peripherymoves into the cuneal throat between it and the support rollersinceotherwise excessive slippage between the twist tube and the drive rollertake s place. Furthermore since, in the interest of high capacity, it isimportant to lodge the highest possible number of processing stations ina machine of given dimension, it is also important to effect the changeof the direction of rotation of the twist tubes so that the lateralspace consumption towards the adjoining processing stations is as smallas possible. Finally, it is essential as well that the position of thetwist tubes changes as little as possible during the change of directionof rotation because such changes of position produce the effect ofdeviating the yarn in the texturing zone which may easily causeirregularities in yarn quality.

I contribute, by the present invention, a device for selectivelychanging the direction of rotation of the twist tube of a false-twisttexturing machine which overcomes the aforementioned difficulties and inwhich the above-noted requirements are fulfilled to a great extent.

According to one aspect of my invention, the device comprises twoaxially parallel rollers rotatable about their axes and mounted on amounting plate in one cuneal throat of which a twist tube may besupported in tangential contact with the circumferential surfaces orrims of the rollers, a magnet, such as a permanent magnet, pressing thetwist tube against the rollers, and drive rolls arranged on extendedroller shafts to be driven by means of a driving belt. On each end ofthe mounting plate, and symmetrically with respect to a plane extendingthrough both cuneal throats of the rollers, I provide means forming apair of parallel bores extending perpendicular with respect to the platesurfaces and positioned outside the contours of the rollers.Furthermore, I arrange a support on the: machine frame and this supportis shiftable in horizontal direction transversely with respect to thewide or driving surfaces of the drive belt, the support having a pair ofparallel vertical pins arranged on its upper face, onto which pins themounting plate may be positioned by fitting either pair of bores on thepins. It will be seen that, since either pair of bores may be fitted on.the pins, the mounting plate, and the rollers and magnet mounted on it,can be positioned in either of two positions 180 opposite from oneanother. In this way, the drive belt can be made to contact one or theother drive roll to drive the twist tube in the rotational sensedesired. Preferably, on the mounting plate, the pairs of bores and therollers may be arranged so that regardless of which of the two pairs ofbores is fitted onto the pair of pins of the support, the position ofthe twist tube in space is the same. Additionally, the magnet may beshaped so that it does not protrude from the contours of the rollers.

There has thus been outlined rather broadly the more important featuresof the invention in order that the detailed description thereof thatfollows may be better understood, and in order that the presentcontribution to the art may be better appreciated. There are, of course,additional features of the invention that will be described hereinafterand which will form the subject of the claims appended hereto. Thoseskilled in the art will appreciate that the conception upon which thisdisclosure is based may readily be utilized as a basis for the designingof other structures for carrying out the several purposes of theinvention. It is important, therefore, that the claims be regarded asincluding such equivalent construction as do not depart from the spiritand scope of the invention.

Specific embodiments of the invention have been chosen for purposes ofillustration and description, and are shown in the accompanying drawingsforming a part of the specificication wherein:

FIG. 1 is a front elevational view of apparatus according to the presentinvention; and

FIGS. 2 to 4 are top views of two adjoining devices shown in variousarrangements.

A plurality of devices according to the present invention may bearranged on a texturing machine consistent with the number of yarntreatment stations, and may be situated beside each other on both sidesof a frame, for example devices numbering 160 may be so mounted, i.e.,on each side of the frame.

Each of FIGS. l and 2 shows two devices A and B according to the presentinvention, having a support 1 which is fixed on two rods 2, 2' shiftablein horizontal direction on the machine frame 3. Each support 1 comprisestwo parallel, vertically extending pins 4, 4' onto which correspondingparallel pairs of bores 6, 6; 7, 7' formed in the mounting plate 5 andextending perpendicular with respect to the plate surface can be fitted,

as desired. Each mounting plate 5 is also provided with two perforationsthrough which the vertical shafts 8, 9 are passed. Rollers 10, 11 arefixed on the shafts 8, 9

respectively, each roller consisting of two discs 10", and 11, 11",which are kept at a distance from each other by means of spacers. In oneof the cuneal throats formed by the discs 10, 10" and 11, 11", the twisttube 12 is supported in parallel position with respect to the rolleraxis, the twist tube being pressed against the disc rims by means of apermanent horseshoe magnet arranged on a support 13. The magnet 14 ispreferably shaped so that it does not protrude beyond thecircumferenceof the rollers 10, 11. Below the plate 5, rolls 15, 16 are provided onthe shafts 8, 9, against which rolls 15, 16, a drive belt 17 may beapplied as desired.

As can be seen from FIG. 2, in device A, the bores 6, 6 of the mountingplate 5 are fitted onto the pins 4, 4 of support 1, and the latter ispositioned so that the drive belt 17, moving in direction of the arrow,drives the roll in counterclockwise direction, the discs 10. 10" movinginto the cuneal throat in which the twist tube 12 is placed, so that thetwist tube rotates in clockwise direction.

On the other hand, in device B, the position of the mounting plate isturned with respect to the position of device A by 180 about the centralaxis of twist tube 12 as the axis of rotation, i.e. the pair of bores 7,7 is fitted onto the pins 4, 4 of support 1. Carrier 1 is in such aposition that the drive belt 17 drives the roll 16 in clockwisedirection, the discs 11, 11' moving into the .cuneal throat so that thetwist tube 12 rotates in counterclockwise direction.

The two twist tubes of devices A and B are associated with two adjoiningyarn treatment stations simultaneously to impart to the correspondingyarns a falsetwist in S and Z direction, respectively.

It may, however, also be desirable that, in two adjoining yarn treatmentstations, an S false-twist be imparted to the yarns, in the twofollowing yarn treatment stations a Z false-twist, etc. In this case,two adjoining devices according to FIG. 3, and thereupon two adjoiningdevices according to FIG. 4 may be provided.

However, the device of the present invention makes it possible to haveany other sequence of S and 2 falsetwist, according to choice, over thewhole length of the machine.

By modification of the described example, it is also possible to arrangethe pins on support 1 so that a bore of a pair of bores 6, 6; 7, 7 maybe fitted onto the same. The pins may, for example, be arranged so thatthe bores 6 and 7' or respectively 6 and 7, may be titted onto thesameor so that the bores 6 and 7, or respectively 6' and 7 may be fittedonto the pins.

A further advantage of the device of the present invention consists inthat the mounting plate may always be fitted onto the pins of thesupport in such a manner that the roller acting as driving roller movesinto the cuneal throat in which the twist tube is placed, the slippagebeing thus minimized. Furthermore, lateral space consumption of thedevice towards the adjoining yarn treatment stations is extremely lowsince the permanent magnet does not protrude from the contours of therollers. Furthermore, upon a change of the direction of rotation of thetwist tube, the position of the same is not altered since the mountingplate is then turned by 180, the central axis of the twist tube beingthe axis of rotation.

Additionally, the device of the present invention makes it possible tohave the twist tubes, viewed from the operating side of the machine,always before the drive belt, whereby introduction of the yarns in therespective treating stations is facilitated and the risk of accidentsreduced.

Finally, the device of the present invention makes it possible in asimple way to reverse the direction of rotation of all the twist tubesof a machine by reversal of the direction of movement of the drivingbelt, fitting of all the mounting plates into their opposite positionbeing necessary only to assure that all the drive rollers move into thecuneal throat in which the twist tubes are provided.

I believe that the construction and operation of my novel apparatus willnow be understood and that the advantages thereof will be fullyappreciated by those persons skilled in the art.

I claim:

1. Device for selectively changing the direction of rotation of a twisttube in false-twist texturing machines, comprising mounting plate means(5), two axially parallel rollers (10,11) mounted on said mounting platemeans for rotation about their axes, said rollers being arranged to formcuneal throats in one of which a twist tube is adapted to be supportedin tangential contact with the rims of said rollers, a magnet (14) forpressing the twisttube towards the rollers (10,11), driving rolls(15,16) arranged on elongated roller shafts to be driven by means of abelt (17), support means (1) constructed and arranged to be shiftablehorizontally relatively to a machine frame and transversely to the widedrive surface of the drive belt, pins projecting from one of said meansand bores formed in the other of said means, said pins being adapted tofit into said bores and said pins and bores being located to permit saidmounting plate means to be positioned in either of two positionsrelatively to said support means whereby the drive belt will drive aselected one of said driving rolls to rotate the twist tube in thedesired rotational sense.

2. Device according to claim 1, characterized in that the permanentmagnet (14) is shaped so that it does not protrude beyond the contoursof rollers (10,11).

3. Device for selectively changing the direction of rotation of a twisttube in false-twist texturing machines, comprising two axially parallelrollers (10,11) rotatable about their axes and arranged on a mountingplate (5) in one cuneal throat of which a twist tube (12) is adapted tobe supported in tangential contact with the rims of the rollers, amagnet (14) for pressing the twist tube towards the rollers 10,11) anddriving rolls 15,16) arranged on elongated roller shafts to be driven bymeans of a belt (17), means forming pairs of parallel bores (6,6; 7,7)in the mounting plate (5), said pairs of bores being disposedsymmetrically with respect to a plane extending through both cunealthroats of the rollers, and perpendicular to said mounting plate andoutside the contours of the rollers (10,11), a support (1) adapted to bearranged on a machine frame (3) said support being shiftable inhorizontal direction transversely with respect to the wide drivesurfaces of the drive belt, and a pair of parallel vertical pins (4,4')mounted on the upper face of said support onto which pins the mountingplate (5) may be positioned by fitting either pair of bores on saidpins.

4. Device according to claim 3, characterized in that the pairs of bores(6,6'; 7,7) and the rollers (10,11) are arranged on the mounting plate(5) so that upon fitting of one pair of bores onto the pair of pins(4,4') of support (1 the position of a twist tube (12) in a cunealthroat between said rollers is always the same in space.

UNHE STATES PATENT ()FENJE mrme or Home Patent No. v 229 Dated August 6v 1974 lnventofls) JOACHIM BIENIOK It is cerfified that error appears inthe above-identified patent and that said Letters Patent are herebycorrected as shown below:

First page," at [30] change "Nov. 1, 1972 Sweden" to Nov; .1 1972Switzerland I Signed and sealed this 29th day of October 1974.

(SEAL) Atteets MCCOY Mu, GIBSON JR, 0. MARSHALL DANN Arresting OfficerCommissioner of Patents USCOMM-DC 60376-P69 w u.s. GOVERNMENT PRINTINGOFFICE Isl 0-365-334.

FORM PO-105O (10-69)

1. Device for selectively changing the direction of rotation of a twisttube in false-twist texturing machines, comprising mounting plate means(5), two axially parallel rollers (10,11) mounted on said mounting platemeans for rotation about their axes, said rollers being arranged to formcuneal throats in one of which a twist tube is adapted to be supportedin tangential contact with the rims of said rollers, a magnet (14) forpressing the twist tube towards the rollers (10,11), driving rolls(15,16) arranged on elongated roller shafts to be driven by means of abelt (17), support means (1) constructed and arranged to be shiftablehorizontally relatively to a machine frame and transversely to the widedrive surface of the drive belt, pins projecting from one of said meansand bores formed in the other of said means, said pins being adapted tofit into said bores and said pins and bores being located to permit saidmounting plate means to be positioned in either of two positionsrelatively to said support means whereby the drive belt will drive aselected one of said driving rolls to rotate the twist tube in thedesired rotational sense.
 2. Device according to claim 1, characterizedin that the permanent magnet (14) is shaped so that it does not protrudebeyond the contours of rollers (10,11).
 3. Device for selectivelychanging the direction of rotation of a twist tube in false-twisttexturing machines, comprising two axially parallel rollers (10,11)rotatable about their axes and arranged on a mounting plate (5) in onecuneal throat of which a twist tube (12) is adapted to be supported intangential contact with the rims of the rollers, a magnet (14) forpressing the twist tube towards the rollers (10,11) and driving rolls(15,16) arranged on elongated roller shafts to be driven by means of abelt (17), means forming pairs of parallel bores (6,6''; 7,7'') in themounting plate (5), said pairs of bores being disposed symmetricallywith respect to a plane extending through both cuneal throats of therollers, and perpendicular to said mounting plate and outside thecontours of the rollers (10,11), a support (1) adapted to be arranged ona machine frame (3) said support being shiftable in horizontal directiontransversely with respect to the wide drive surfaces of the drive belt,and a pair of parallel vertical pins (4,4'') mounted on the upper faceof said support onto which pins the mounting plate (5) may be positionedby fitting either pair of bores on said pins.
 4. Device according toclaim 3, characterized in that the pairs of bores (6,6''; 7,7'') and therollers (10,11) are arranged on the mounting plate (5) so that uponfitting of one pair of bores onto the pair of pins (4,4'') of support(1), the position of a twist tube (12) in a cuneal throat between saidrollers is always the same in space.